Kent · England
Window Mastic in Hartlip
Mastic around window and door frames, sills and patio doors for homes and businesses in Hartlip and across Kent. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked or shrunken mastic around the frame
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
Hartlip: your questions answered
Is Hartlip within the area you cover?
Yes, Hartlip is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Newington station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
Will resealing my frames help with draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or send us an email.
Does the work come with a guarantee?
Yes, for 12 months. A yearly look at the joints helps them last.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Window mastic for homes and businesses in Hartlip
The new joint does not have to be white. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. Common call-outs are for black, perished sealant on frames and rain getting in at the frame or under the sill, on timber windows & doors, window sills and patio & French doors.
Around Hartlip, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
All of our work is guaranteed for twelve months.
- Place
- Hartlip (ME9)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Hartlip
More services for Hartlip
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Looking after it afterwards
So the new joints stay in good condition:
- Avoid harsh chemicals near the mastic
- Clean frames with a soft cloth and soapy water
- Clear any debris from frame drain holes
- Ventilate rooms so frames don’t stay wet inside
Try not to touch the new joint while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Quotes for window mastic in Hartlip
You’ll get a clear quote before any work starts. It takes into account:
- The number and length of the joints
- The number of rooms or windows
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Access, such as stairs, a lift or height
- Where the property is
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved.
Should I try it myself first?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
When something else is needed
In fairness, some problems need a different trade:
- A frame that has rotted at the joint
- A sash or casement that will not close properly
- Damp problems in the wall away from the window
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Where we work in Hartlip
- Window sills
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Composite doors
- Aluminium frames
Common problems we fix in Hartlip
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
The most common problems we see are:
- Cold air getting in at the frame edge
- Gaps between the frame and the inside reveal
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
If you let a flat or house near Newington station, renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- Who turns up on the day
- How hidden problems are handled
- Are they insured?
- What preparation is included
What window mastic looks like in Hartlip
Hartlip is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of St Michael, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Hartlip Endowed Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Hartlip is about 3 miles south-east of Gillingham, in Kent. Hartlip gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 922 towns and villages across Kent. You can also see our page for Chelmsford, about 28 miles away.
Here we cover the ME9 postcode area for window mastic. That includes homes and businesses on The Street, Dane Close and Place Lane and the roads around them. Other places close to Hartlip include Lower Hartlip (1 mile east), Moor Street (1 mile north-west), Breach (1 mile north-east), Meresborough (1 mile west) and Newington (1 mile east). Further out, we also cover Maidstone (7 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (14 miles north-west) and Minster (9 miles north-east).
Local landmarks in Hartlip
Typical jobs here are in homes near Leigh Academy Rainham and Foxburrow Wood. The nearest railway station is Newington station, about 1.3 miles east. Nearby you will also find Bayford Court (4.5 miles east) and Medway Maritime Hospital (4.8 miles north-west). For a walk, there’s Detling Hill and Bishop Saltings.
What happens on the day
On the day, we start by going over the job with you. Surfaces next to the work are protected before we start. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Hartlip, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
- Move anything stored near the joints
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.